Suggestions for VTF-1

[Tuckfro]

About a year and a half ago I purchased a VTF-1 to go in our living room. I absolutely loved it. Since then, we have finished our basement and the HT has been moved down there. This is great as far as cranking up the volume, but I can't get the VTF-1 to sound "right" in its new location. There is, now, noticeable chuffing and bottoming out, and I can easily locate some of the lower frequencies (I'm thinking this has more to do with room resonances). Any suggestions?

http://i278.photobucket.com/albums/kk89/tuckfro/_1213371105.jpg

The room is 26x12x9. I've got the sub placed diagonally in the corner behind the sectional. Crossover set to 80hz in the HK 246. VTF in extended mode, one port open, gain at 9 o'clock.

Oh, and I know I "need" at least a 3.3 in this room, but unless the good Dr. decides to send me one because he feels sorry for me, the VTF-1 has to do for a while.

[cacihome]

About a year and a half ago I purchased a VTF-1 to go in our living room. I absolutely loved it. Since then, we have finished our basement and the HT has been moved down there. This is great as far as cranking up the volume, but I can't get the VTF-1 to sound "right" in its new location. There is, now, noticeable chuffing and bottoming out, and I can easily locate some of the lower frequencies (I'm thinking this has more to do with room resonances). Any suggestions?

http://i278.photobucket.com/albums/kk89/tuckfro/_1213371105.jpg

The room is 26x12x9. I've got the sub placed diagonally in the corner behind the sectional. Crossover set to 80hz in the HK 246. VTF in extended mode, one port open, gain at 9 o'clock.

Oh, and I know I "need" at least a 3.3 in this room, but unless the good Dr. decides to send me one because he feels sorry for me, the VTF-1 has to do for a while.
Have you calibrated your system?
Try the max out mode if you want more output with less chuffing and bottoming...
Play the test cd HSU gave you and use the lower freq tracks you can to determine what is vibrating and take care of it...

[Tuckfro]

Yes, I have calibrated...I'm having to run the sub 'cold' (opposite of hot?) about 2-3dbs.
In max out I can definitely tell where the bass is coming from - which I don't like.
I guess I'll have to dig through the closet for that test CD.
BTW...Do you think that the room on the right is causing some of the problems? It is a playhouse, so my daughters wouldn't be too happy if I filled it with insulation or mineral wool - but, maybe, moving the sub away from it might help?

[cacihome]

So... it is not solid wall? Is it a plastic like material that shakes a lot?
MMM.....
Have you tried putting a rug under the subwoofer? Check phase(not a big issue but..), It should'nt become localizable if you are using an 80hz xover...Try the rug. Remeber to let the ports breathe(3")...

[Tuckfro]

No, it's a solid wall. Playhouse is a room 11x8. Just thought it might exaggerate some freq. I don't think putting a rug under the sub will do anything, it's on a concrete slab covered with 8lb pad and thick wool carpet. I'll try moving it to the other side of the sectional - between chair and sectional.

[Pete_Hsu]

Hi Tuckfro,

Would it be possible for you to move your couch and speakers/TV to a different part of the room? According to Dr. Hsu, the current location for your listening area is not very good because it gives a dip in the frequency response from the room's standing waves. It would be much better if you could put your couch in the upper left hand corner of the picture, and move your sub to the lower right hand corner of the picture.

Sincerely,